<template>
<div class="login_container">
    <div class="login_box">
        <!-- 头像区域 -->
        <div class="avatar_box">
            <img src="../assets/logo.png">
        </div>
        <!-- 登录表单区域 -->
        <el-form ref='loginFormRef' :model='loginForm' :rules='loginFormRules' label-width="0px" class="login_form">
            <!-- 用户名 -->
            <el-form-item prop='username'>
                <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
            </el-form-item>
            <!-- 密码 -->
             <el-form-item prop='password'>
                <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type='password'></el-input>
            </el-form-item>
            <!-- 按钮区域 -->
            <el-form-item class="btns">
                <el-button type="primary" @click="login">登录</el-button>
                <el-button type="info" @click="resetLoginForm">重置</el-button>
            </el-form-item>
        </el-form>
    </div>
</div>
    
</template>


<script>
export default {
    data(){
        return{
            // 登录表单的数据绑定对象
            loginForm:{
                username:'admin',
                password:'123456'
            },
            // 登录验证规则对象
            loginFormRules:{
                username:[ 
                    { required: true, message: '请输入登录名称', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }],
                password:[
                     { required: true, message: '请输入登录密码', trigger: 'blur' },
                    { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }
                ]

            }

        }
    },
    methods:{
        // 点击重置按钮,重置登录表单
        resetLoginForm(){
                // console.log(this);
                this.$refs.loginFormRef.resetFields()
            },
        login(){
            this.$refs.loginFormRef.validate(async (valid)=>{
                // console.log(valid)
                if(!valid) return;
               const {data:res}= await this.$http.post('login',this.loginForm)
            //    console.log(res)
                if(res.meta.status!==200) return this.$message.error('登录失败')
                    this.$message.success('success')
                
               /*  1.登录成功之后的token,保存到客户端的sessionStorage中
                    1.1项目中除了登录之外的API接口,必须在登录状态下访问
                    1.2token只在当前网站打开期间有效,因此token保存在sessionStorage
                2.通过编程式导航跳转到后台主页,路由地址为/home */

                // console.log(res)
                window.sessionStorage.setItem('token',res.data.token)
                this.$router.push('/home')
            })
        }
        }
}

    

</script>


<style lang="less" scoped>
.login_container{
    height: 100%;
    background-color:#2b4b6b;
}
.login_box{
    width: 450px;
    height: 300px;
    background-color:#fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
}
.avatar_box{
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color:#fff;
    img{
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
    }
}
.login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;

}
.btns{
    display: flex;
    justify-content: flex-end;

}
</style>